fixes and enhancements in French translation

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@8520 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/tasks/test/AggregatedTestResultPublisher/config_fr.properties

+Automatically\ aggregate\ all\ downstream\ tests=Assembler automatiquement tous les tests en aval